"While these impressions may be mistaken for potholes caused by weathering, close examination reveals many footprint features," Seiler says.
Dinosaur footprints are named by their shape because the animals that made them haven't been identified. Four kinds of footprints were found on the trample surface:
An Oasis for Dinosaurs in a Vast Desert of Dunes
When the footprints were made 190 million years ago, "the continents were arranged so this area was in the tropics" and was part of the supercontinent named Pangaea, says Seiler. "It was a desert, like the Sahara but much larger than the Sahara is today," covering much of Utah, Wyoming, Colorado, New Mexico, Arizona and Nevada.
"Some studies indicate winds probably were much stronger than normal because all the continents were together," says Chan. "That's why you had monster dunes."
"To support large dinosaurs, there probably wasn't just one water
|Contact: Lee Siegel|
University of Utah